Among the given reactions, the one which is not a symmetrical addition reaction has to be identified. Concept Introduction: Chemical reaction in which an atom or a group of atoms are added to each carbon atom of a carbon‑carbon multiple bond in a hydrocarbon or hydrocarbon derivative is known as addition reaction. In this reaction no atoms or group of atoms are removed. Instead the unsaturated bond is reduced to saturated bond. A general scheme for addition reaction of alkene can be given as shown below, Addition reactions can be classified broadly into two types. They are asymmetrical addition reaction and symmetrical addition reaction. Symmetrical addition reactions is the one in which the same atom or same group of atoms are added across the carbon‑carbon multiple bonds. Unsymmetrical addition reactions is the one in which the different atom or different group of atoms are added across the carbon‑carbon multiple bonds.

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Transcription and Translation 1. What is the main function of transcription and translation? (2 marks) 2. How is transcription different in eukaryotic and prokaryotic cells? (2 marks) 3. Explain the difference between pre-mRNA and post-transcript mRNA. (2 marks) 4. What is the function of the following: (4 marks) i. the cap ii. spliceosome iii. Poly A tail iv. termination sequence 5. What are advantages to the wobble feature of the genetic code? (2 marks) 6. Explain the difference between the: (3 marks) i. A site & P site ii. codon & anticodon iii. gene expression and gene regulation 7. Explain how the stop codon allows for termination. (1 mark) 8. In your own words, summarize the process of translation. (2 marks)

Answer 1

Question

Chapter 13.10, Problem 1QQ

Interpretation Introduction

Interpretation:

Among the given reactions, the one which is not a symmetrical addition reaction has to be identified.

Concept Introduction:

Chemical reaction in which an atom or a group of atoms are added to each carbon atom of a carbon‑carbon multiple bond in a hydrocarbon or hydrocarbon derivative is known as addition reaction.

In this reaction no atoms or group of atoms are removed. Instead the unsaturated bond is reduced to saturated bond. A general scheme for addition reaction of alkene can be given as shown below,

Addition reactions can be classified broadly into two types. They are asymmetrical addition reaction and symmetrical addition reaction.

Symmetrical addition reactions is the one in which the same atom or same group of atoms are added across the carbon‑carbon multiple bonds.

Unsymmetrical addition reactions is the one in which the different atom or different group of atoms are added across the carbon‑carbon multiple bonds.

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